A Study on the Shape Control of Multiple Layers for PES Nanofiber Using Electrospinning Method of Top-down Spinning

Abstract

In this study, we investigated the diameter and pore control of PES nanofibers by focusing on the process parameters such as concentration of polymer solution, applied voltage of spin column, and injection rate of polymer solution among various electrospinning parameters. The device for electrospinning was designed by modularizing to be able to cope with changes in test conditions and large area. The detailed device consists of a fabric feeding part, a spinning part, a soaking part, a drying part, and a fabric transfer part, the spinning device is based on top-down spinning and the spinning column is composed of 12 columns with 10 nozzles per column. The results obtained from this study are as follows. The maximum pore diameter is less than 22 kV at an applied voltage of 20 kV, the standard deviation of nanofiber diameter at each applied voltage means that the fibers radiated at 20 kV from 18 kV to 245.84 nm, 20 kV at 183.52, and 22 kV at 232 kV were more uniformly emitted, it has been proved that the nanofibers are radiated unevenly due to the effect of the strong applied voltage at 22 kV.